变压器铁心多点接地故障的模拟试验

Simulation Experiment of Transformer Core Multi-point Grounding Fault

电力系统变压器铁心多点接地是引发变压器故障的重要因素,仿真分析了10 kV变压器出现不同铁心多点接地故障时的接地电流分布情况,并实测分析了一台10/0.4 kV、30 kVA的配电变压器人为设置铁心多点接地故障后的接地电流,对比实测数据与仿真结果表明两者变化趋势基本一致,表明故障分析的准确性。

Multi-point grounding of power system transformer core constitutes a large proportion of transformer faults.This paper analyzes the earthing current distribution features when different multi-point grounding faults occur in 10kV transformer core.And realtime testing was made to mimic the scenarios of multi-point grounding fault on a 10 /0.4kV,30KVA distribution transformer.The comparison shows that the general distributions of simulated earthing current are in accordance with their corresponding laboratory experimental results,proving the fault analysis accuracy.